Topic: ANTMINER S4 Discussion and Support Thread - page 11. (Read 301481 times)

hmm,
i decide to publish this shitty problem kill modification and i will publish J7 FPGA voltage mode fix PDF soon. follow my posts on this weekend, i can late because i am very busy on my projects but times come. i love this board members  and i want to help you...

Yeah i know its a bit disgusting, i was discussing this with lovenlifelarge in PM since he was telling me more about the S4 firmware.

In short; I bought mine for 550CAD, it's worth a bit more, maybe 500+ US since its basically 5 S3 packaged in one and come with a PSU. But its definitively not worth 800USD+.

People on Ebay are quite often idiots. They have no idea of the ROI and they buy stuff. Its like those super outdated sticks that sell for 50$.
Then they come complain here and ask why the pool isint sending them millions of BTC, instead they just get a few sats...

For 800USD i'd sell my own S4.

What country did you get 850?   Mind saying where you sold it?

Dang someone paid quite a bit more the going rate.

Im happy to say i sold my S4 today for what i paid for it 9 months ago.. US$850

I leave this thread after many month of fun...

Later!

Thanks, But i have plan to buy s7 and replace my older miners.

The main thing is the breaker at top of main.  If that says 125 its hard to say I guess you would need to go through and see how much you are using.   Honestly you chances are could get a electrician to put in a quote and ask them... might be able to get that anwser for free.   

But if you use too much it should flip the main and everything goes off.  So no not really a great thing to happen.  Would be a pain.

Yeah i checked it a while back, its a 125AMP circuit and i'm not sure how high i want to keep it running 24/7. For instance sure i could probably go to 80-90 AMP but then what happen when i use the oven and hot water tank? Blap over circuit, i think the switch is in the apartment's electric room so it might be a bit hard to explain how i tripped 125AMP in an apartment.

The board says 125AMP 120/240 so i'm not quite sure what it's real limit is and i don't have a way to track how much consumption the other appliances put on it and i'm already at 60AMP at 120v just with miners.

So maybe i could get away with one 240v but then again it's hard to tell accurately how much power i can take with all the stuff on at the same time.

I would agree on your math.   If you paid 400 I would probley just let it run at current spec as any good PSU is probley cheapest 1/4 of the cost miner... and 25 percent for psu is pretty high.

I was hoping it was PCIe where you did not have to cut.  With the antminer one it could be cut... but not sure on replacement after it would probley lose a little value on psu.

On 240 if you have the power it is not as hard to do as i thought.  I owe phil a lot on helping me with parts.    But you would have to first look at your main and see how many amps if 100 chances are not really set up for it.   200 amps then chances are can handle another 240 install.   

It's not PCI-e. But its not particularly hard to change out, basically the problem i have is i don't have any 240V outlets. And i'm not sure i want to start stripping my electric heating off and do the wiring myself to plug those wires in a 240 outlet because i have no experience with that, its not very necessary yet, i'm supposed to move soon etc. It is something i consider doing once i have moved however.

With the blunt fact that i paid 400$ for the S4, i don't really feel like paying 200$ to get 300 more GH from it...
Unless some nice deal fall on my lap, i don't think i will be changing the PSU. I'm planning on running it just under its max load of 1440W so hopefully it wont crap out before i'm done with it.

Which version is it on power?  There are the ones that use the pols and the pcie ones.   If pcie it's pretty easy to change out (other requires cutting and more time to do)

But it's a little bit more power then you need but if on 220/240 I would look at the bitmain server PSU's - https://www.bitmaintech.com/productDetail.htm?pid=000201505040743496917U7kGsCm0694 .  They are a little pricey but I have been impressed with them.

Thank you!

Look like the guide to install smit's worked tho. So i get a nice 2800-2600 RPM now. And i manually installed cgminer 4.9.0.

So i'm messing with voltage now, look like even though its not the PSU that came with the machine (That one died according to the original owner), the replacement he got is the same crap. It look pretty unstable, it doesn't even seem to do 0710 at 206.5 without eventually a drop in hash after 20-30 minutes and a few chip drops.

I was kinda of hoping getting a bit extra hashrate than stock for a bit less power than stock settings but it look like i might have to pick between a bit more hash or a bit better power efficiency.

Another "quirk" is that the Fan4 is fried, i got the 2 stock fan he removed, Fan3 and Fan4, both doesn't seem to work but the PCB of the fan that was probably in Fan4 is fried, burnt to a crisp! So i'm guessing something shorted and it fried the Fan4 controller.

Right now if i plug it in, the Fan doesn't start if its on PWM and if i plug it as 2 pin it work at full speed but the RPM report goes haywire. So i'm guess i'll try to find a 3rd fan, since right now its running with some led fan you put in your computer case for show.



So even though it's sifting air strait from outside's 10C the temp are still high so this is obviously just a setup i can run during winter. But at least for now my ears are saved.

I have 4 spare S4 hash boards if you'd like to repair your S4. Pm me if interested.

Virosa, /etc/init.d/cgminer.sh

I saw that one is working.  Just looking at damage - https://bitcointalksearch.org/topic/m.12392384 I would not run it.

It seems dangerous as we don't know full damage.  I guess I am just safe as I don't want to have electrical fire or other bad things that could happen.  That machine is really really bad.  And I was thinking Bitmain also said don't run it.

Where would be the right place to input that command? I probably won't need it since i found out you can flash an old version to the S4, then add smit's low fan, then install the last version cgminer version and keep Volt control.

Also, i'm thinking of grabbing another S4 now, so a Canadian seller would be pretty nifty.

I think you didn't see this line on my first post : "but one them still working(hashing)."
I just ran one blade with a little burn spot:





Others are completely useless.

OUCH @ the water damage. Guess the PSU doesn't have working protection circuits to trip off when needed.

When you say running what does the status screen look like?  If you are able to please post status sowing blades and chips.

I just had not seen one like this before.

Oh sorry,  I forgot to reply.
Yes they said that is not safe to run.
But it's running for almost a week and no problem. i put it in a safe palace and pointed to solo.ckpool !

I have to ask what did bitmain say to your ticket or email about it being safe?  I really want to hear response to it.

I think they will nicely say no on running, but wanted to hear.

Here is my wisdom Meech

Just wanted to update u all on my latest findings for the S4 for under clocking/volting...


Best underclock using sept 04 2014 image

Running on 240 volts (In Australia)

Using Freq : 100 & Volt : 0670

I get around 980gh @ 640w - (Tested with a kill o watt)

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https://bitmain.zendesk.com/hc/en-us/article_attachments/200965819/s4sep26.img.gz

u'll need to unzip this & use hdd raw copy to image this to ur sd card (U'll need to take the sd card out of the miner & do this on ur pc)

This will give u undervolting again...

Now i know this uses an old cgminer & is known to have issues so do this..

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This will install Smit's low fan firmware (To keep noise to absolute min) & cgminer 4.9. It will also survive a reboot...

Connect to your S4 via SSH. We all know that username is "root", password is "admin". Also we all know that we need use PuTTY software

Then we get into /mnt/mmc1 folder:

Code:
cd /mnt/mmc1

Rename initramfs.bin.SD to initramfs.bin.SD.orig (or with any name convenient for you) to make rollback possible:

Code:
mv initramfs.bin.SD initramfs.bin.SD.orig

Then we can download those tho images for slow fans & cgminer 4.9

Code:
wget http://95.84.240.160:8080/s4_symlink/S4_cgminer_symlink_low_fan.initramfs.bin.SD -O initramfs.bin.SD


Now we are ready to download cgminer. Note that after above steps we have to put cgminer's files to /config/cgminer folder, otherwise mining will not start.

We can now download and put cgminer to the necessary folder with this code:

Code:
cd /config && wget http://95.84.240.160:8080/s4_symlink/cgminer_4.9.0_S4 -O cgminer && chmod +x cgminer

Now type exit & reboot ur machine.

Any problems please ask or pm..

PLEASE BE AWARE - The slow fan firmware should only be used at the underclocked & undervolted settings... U could start a fire if u use this at full speed!!

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UPDATE

If u can get the J7 board to set the voltages correct on startup (This requires a kill o watt or similar)

To do this u'll need to start & restart the machine till the kill o watt tells u the right voltage / watts...

The amount of restarts is random so just keep trying it till it sets right.

Old settings as above with J7 on the loose will give 640w

With the J7 running correctly it will be 600w, (Tested with a kill o watt) That's another 40w saving....

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Hey Bitmain I believe i finally got ur 0.6w u were original boasting about, Just funny it took ur new product to come to market before

this ever happened..

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I believe this is the maximum savings we will get out of the S4 until someone does a hardware hack...

Be interesting to see if anyone can replicate or better these settings!

Big thanks goes to : sjenja who worked out the J7 problem...